H
Helen Xu
Researcher at Massachusetts Institute of Technology
Publications - 23
Citations - 258
Helen Xu is an academic researcher from Massachusetts Institute of Technology. The author has contributed to research in topics: Cache & Competitive analysis. The author has an hindex of 5, co-authored 19 publications receiving 113 citations.
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Proceedings ArticleDOI
A Vacuum-driven Origami “Magic-ball” Soft Gripper
Shuguang Li,John J. Stampfli,Helen Xu,Elian Malkin,Evelin Villegas Diaz,Daniela Rus,Robert J. Wood +6 more
TL;DR: A light-weight, vacuum-driven soft robotic gripper made of an origami “magic-ball” and a flexible thin membrane that can lift a large variety of objects and produce significant grasp force on various shapes using negative pneumatic pressure (vacuum).
Proceedings ArticleDOI
Dynamic Programming with Spiking Neural Computing
TL;DR: It is demonstrated that a broad class of combinatorial and graph problems known as dynamic programs enjoy simple and efficient neuromorphic implementations, by developing a general technique to convert dynamic programs to spiking neuromorphic algorithms.
Proceedings ArticleDOI
Write-Optimized Skip Lists
Michael A. Bender,Martin Farach-Colton,Rob Johnson,Simon Mauras,Tyler Mayer,Cynthia A. Phillips,Helen Xu +6 more
TL;DR: This work gives an external-memory skip list that achieves write-optimized bounds, and uses extremal-graph coloring to show that it is possible to decompose paths in the skip list into uncorrelated groups, regardless of the insertion/deletion pattern.
Proceedings ArticleDOI
Packed Compressed Sparse Row: A Dynamic Graph Representation
Brian Wheatman,Helen Xu +1 more
TL;DR: A new dynamic sparse graph representation called Packed Compressed Sparse Row (PCSR), based on an array-based dynamic data structure called the Packed Memory Array, is introduced, suggesting that PCSR is a lightweight dynamic graph representation that supports fast inserts and competitive searches.
Proceedings ArticleDOI
Terrace: A Hierarchical Graph Container for Skewed Dynamic Graphs
TL;DR: Terrace as discussed by the authors uses a hierarchical data structure design to store a vertex's neighbors in different data structures depending on the degree of the vertex, which can dynamically partition vertices based on their degrees and adapt to skewness in the underlying graph.